Rear trailing arm broken bolts, How in trouble am I?? Options

[PaIsa]

Long story short, 2 of the 3 bolts holding the left rear trailing arm broke on me. One broke and left some of the bolt out of the hole so I thought I could get it with heat and vise grip but nope. She is stuck. The other one broke and what is left is in the hole.

I cannot believe I am the first 914 owner dealing with this.

As I said, for the bolt that left me something to work with my plan was to heat it and use vise grip to try to get it. Tried on multiple occasion but she does not want to come out.

For the other one I guess I only have left to dril it out and try to redo the threads hoping for the best.

Does anyone has any other advice or method to try.

I do not have a welding machine so welding a nut is not an option for now and not sure it would work (for the one that sticks out of the hole).

I am open for any advice. I plan to work on this with my son this weekend.

Thanks

[technicalninja]

Those bolts go all the way through the body and have plastic plugs sealing the other end.

If you look on the top side of the suspension console you can find the plugs, they may be covered in undercoating. Pull them out and you will see the threaded section.

I use "pimp juice" on rusted ferrous parts. Works better than anything I've ever bought!

1/2 acetone (nail polish remover) and 1/2 DEXIII atf. I use the old stuff over DEXVI.

Soak bolts...

Sometimes I've had the pimp juice "Free up" completely locked up junk.

I have a set of left-handed cobalt drill bits that I would use next to drill out centers of bolts (the buried one). Sometimes the drill itself extracts the bolt.

The one that is still sticking out I'd clamp VGs on and work bolt back and forth a tiny bit until I saw movement. If you can break it lose you WON!

Worst case I'd carefully use a torch to heat up the threaded insert. Heating from the bolt side (with torch) won't work.

They do have "inductive" bolt heaters that MIGHT work on the one exposed. I have not used one yet but they can apply the heat specifically to the bolt and heat up the stuck portion enough to make a difference.

The internal broke off one would be the one I'd expect trouble out of